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Expired Canadian patentCanada

Process and an apparatus for mixing substances

CA 1290744 C · Owner: Groupe Laperriere & Verreault Inc. (Le) · Inventors: Verreault, Laurent

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The present invention relates to a process and an apparatus for blending substances in a highly accurate manner. The process consists of delivering an amount of a first substance into a mixing vessel and determining the weight of the amount of the first substance actually delivered. From the weight measured and the proportion of a second substance in the final blend an amount of the second substance is calculated and discharged in the mixing vessel, and same for each additional substance.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 8, 1987
GrantedOctober 15, 1991
Term endedOctober 15, 2008
Patent numberCA 1290744 C
Classification (IPC)B01F15/04 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedJuly 8, 1987Patent grantedOct 15, 1991Term endedOct 15, 2008

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.